已知:还原性HSO—3>I—,氧化性IO—3>I2。在含0.3mol NaHSO

题型:选择题

问题:

已知:还原性HSO3>I,氧化性IO3>I2。在含0.3mol NaHSO3的溶液中逐滴加入KIO3溶液。加入KIO3和析出I2的物质的量的关系曲线如右图所示。下列说法不正确的是

A.0~b间的反应可用如下离子方程式表示:3HSO3+IO3=3SO42+I+3H

B.a点时消耗NaHSO3的物质的量为0.12mol

C.当溶液中I与I2的物质的量之比为5:2时,加入的KIO3为0.18mol

D.b点时的还原产物可能是KI或NaI,b~c间的还原产物是I2

考点:氧化还原反应的配平
题型:选择题
任务型读写(满分5分)
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Keeping better eating habits can help you reduce (减少) disease. A healthy eating plan means choosing the right food to eat and preparing food in a healthy way.
Toothbrush
Do you often change your toothbrush? Maybe you think it is not necessary. A study shows old toothbrushes bring disease. You should often change your toothbrush.
Exercise
Swimming, running, skating, skiing, dancing, walking and some other activities can help you keep healthy. You should exercise at least three times a week and for twenty minutes or more each time. Do it.
Plan Out(规划) Your Life
You should have breakfast before you go to school. Have a proper (合适的) meal for lunch. Follow a healthy diet(饮食).
小题1: How often  should you  exercise?(1分) 
小题2:A healthy eating plan means _____________(1分)
小题3: How to plan out your life?(2分)
小题4: You should have breakfast before you go to school.(改成否定句1分)
题型:选择题

能清湿热,退黄疸的药物是( )

A.人参配白术
B.人参配附子
C.人参配蛤蚧
D.人参配当归
E.人参配麦冬、五味子

题型:选择题

简述平视取景照相机的特点。

题型:选择题

成人每日消化道出血多少毫升出现黑粪()

A.5ml

B.20ml

C.30ml

D.40ml

E.50ml

题型:选择题

根据《指导外商投资方向规定》的规定,下列选项中,属于限制类外商投资项目的有( )。

A.占用大量耕地,不利于保护、开发土地资源的

B.能够发挥中西部地区的人力和资源优势,并符合国家产业政策的

C.属于国家逐步开放的产业的

D.运用我国特有工艺生产产品的项目

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